Verification At 1 M; Verification At 50 - Fluke 5520A Service Manual

5520A
Service Manual
and the frequency to 1 kHz. Then follow these steps to verify the wave generator
function.

6-67. Verification at 1 M

Set the Calibrator Mainframe impedance to 1 M (The blue softkey under SCOPE Z
toggles the impedance between 50
1. Connect the BNC cable to the Calibrator Mainframe's SCOPE connector. Connect
2. Set the 5790A to AUTORANGE, digital filter mode to FAST, restart fine, and Hi
3. Program the Calibrator Mainframe to output the wave type and voltage listed in
4. Allow the 5790A reading to stabilize, then record the 5790A rms reading for each
5. Multiply the rms reading by the conversion factor listed to convert it to the peak-to-

6-68. Verification at 50

Set the Calibrator Mainframe impedance to 50
toggles the impedance between 50
1. Connect the BNC cable to the Calibrator Mainframe's SCOPE connector. Connect
2. Set the 5790A to AUTORANGE, digital filter mode to FAST, restart fine, and Hi
3. Program the Calibrator Mainframe to output the wave type and voltage listed in
4. Allow the 5790A reading to stabilize, then record the 5790A rms reading for each
5. Multiply the rms reading by the conversion factor listed to convert it to the peak-to-
Multiply the peak-to-peak value by (0.5 * (50 + Rload) / Rload), where Rload = the
actual feedthrough termination resistance, to correct for the resistance error. Compare
result to the tolerance column.
6-50
the other end of the BNC cable to the 5790A INPUT 2 using the BNC(f) to Double
Banana adapter.
Res on.
Table 6-35.
wave type and voltage in Table 6-35.
peak value. Compare result to the tolerance column.
the other end of the BNC cable to the 50
5790A INPUT 2 using the BNC(f) to Double Banana adapter.
Res on.
Table 6-36.
wave type and voltage in Table 6-36.
peak value.
and 1 M ).
(The blue softkey under SCOPE Z
and 1 M ).
feedthrough termination then to the